B:-Method of sludge dilution
C:-Method of rapid sludge digestion
D:-Method of sludge disposal
Correct Answer:- Option-D
Question49:-In the oxidation ditch, the excess sludge is taken to
A:-Anaerobic digester
B:-Aerobic digester
C:-Drying bed
D:-Incinerator
Correct Answer:- Option-C
Question50:-Which of the following industry is least polluting?
A:-Cement industry
-Electronic industry
C:-Rolling mills
D:-Thermal power plant
Correct Answer:- Option-B
Question51:-When the meridian of a place changes with time then this meridian will be
A:-Arbitrary
-Magnetic
C:-True
D:-Grid
Correct Answer:- Option-B
Question52:-The lines of force of earth's magnetic field are parallel to the earth's surface.
A:-Near to poles
-At right angles to poles
C:-At 45 degree to the line joining poles
D:-Near the equator
Correct Answer:- Option-D

Question53:-The bench mark established by the Survey of India Department with very high precision with reference to mean
sea level is known as

A:-GTS bench mark
B:-Permanent bench mark
C:-Arbitrary bench mark
D:-Temporary bench mark
Correct Answer:- Option-B

Question54:-When a contractor is paid certain percentage over the actual cost of construction as his profit such contract is
termed as

A:-Lump sum contract.
B:-Work order
:-Schedule contract
D:-Cost plus percentage contract
Correct Answer:- Option-D
Question55:-Estimate expected to be least accurate is
A:-Supplementary estimate
-Plinth area estimate
C:-Detailed estimate
D:-Revised estimate
Correct Answer:- Option-B
Question56:-The valuation of a building depends upon
A:-Its structure and durability
ize, shape and type
C:-Quality of materials used
D:-All the above
Correct Answer:- Option-D
Question57:-When the times of earliest finish and the latest finish are equal in an operation, the operation is called
A--critical
B:-float
C:-free float
D:-all the above